Curtain-fixture



(No Model.) A

A. SWEBTLAND.

` .annum FIXTURE, N4'...274.049. Patented*Mar.1'3. 188s.

mmh- MEME y UNITED `STATES ALVAH SWEETLAND, OF SYRAGUSE, NEW YORK.

. PATENT ,l GFFICE VCURTAIN-FlxTURF..

SPEGIFCATION forming' part of Letters Patent No. 274,049, dated March 13, 1883.

Application filed September 9, 1882.

To all whom it may concern Be it known that I, ALVAH SWEETLAND, of

V of New York, have invented new and useful Improvements in Curtain-Fixtures, of which the following, taken in connection with the accompanying drawings, is a full, clear, and exact description.

My invention relates to that class of curtainfixtures known asspringrollers,77 andhas particular reference to the means employed for stopping the rotation of such rollers at desired points at will; and it consists in certain features hereinafterdescribed, and specifically set forth in the claims.

Figure 1 is a longitudinal section; Fig. 2, a transverse section on the line :t x of Fig. l; and Figs. 3 and 4. aredetails, in side elevation, of a spring-roller embodying my invention.

Like letters refer to like partsiu all the figures.

Rrepresents thecurtain-roller, provided with an internal spiral spring, S, secured at one end to the roller and at the other to the spindle c, which is loosely connected to the roller, and prevented from rotating by the bracketB. The

y collar (l maintains the spindle and roller relatively concentric. All of the above being of usual construction, and operating for wellknown purposes, requires no further specific description.V The spindle c is in this instance provided with main depressions r and adjacent auxiliary depressions, n, and these are in this Ainstance, arranged on opposite sides of the spindle. The collar Gis diametrically b or'ed, as at a, and in this instance at a right angle to the spindle lengthwise, and also in thisinstance at opposite sides thereof. Within each of the bores a is a bolt, b, the inner end of which is adapted to t the main depressions r and to ride the auxiliary depressions n. In

this instance the auxiliary depression at is in such closeproximity to the main depression as to be almost merged therein, as at e, and the main depression r is inclined, so as to form an abrupt termination, as at s, which merges into vthe hub c ofthe spindle, which forms a smooth periphery, upon which the bolt or bolts ride between the depressions.

'v represents a metallic cap or ferrule, which, when applied, covers the ends ofthe boltfseats or borings a, as shown.

In the usual construction of rollers of this (No model.)

class devices dependent upon centrifugal motion have been employed as stops, and said motionhas been governed by the rapidity of ascent or descent given to the curtain. So, in this instance the bolor bolts b are thrown outward by a rapid ascent or descent of the curtain, and by slowing said movements sufciently said bolts approach the spindle by gravity, and finally become seated in the main i to render them inoperative; but by my device a'less rapid motion is required, in and for the reason that the auxiliary depressionln gives an outward motion or impulse to the bolt, which is sufficient to carry it over the main depression when it lands upon or returns to the plain portion c of the spindle, to be again acted upon by the auxiliary depression, and this operation takes place with a relatively slowv movement ot' the curtain. Now, it is evident that a single main and a single auxiliary depression and a single bolt will accomplish the objects in view-viz., reduce the hitherto required speed of movement in the curtain to render the stop devices inoperative. So, also, it is evident that the bolt-seatsa may be bored tan gentiall y to the spindle; and itis also apparent that more than two bolts and two sets of depressions, main and auxiliary, may be employed without a departure from my invention. I therefore do not limit myself in these respects, nor as to the particular formation of the roll-spring or bracket, as my invention is applicable to any and all of the well-known constructions of rollers of thisv class. Even the well-known pivoted ratchets maybe used in connection with my l main and auxiliary depressions.

Having described my invention and its 0peration, what I claim isl. A roller-spindle provided with a main and.

' inga main and an auxiliary depression and means carried by the roller for locking the same by contact with the main depression, suhstantally as and for the purpose set forth.

3. A roller-spindle having two or moremain depressions, with adjacent auxiliary (lepres- In testimony WhereofI have hereunto signed sions separated by a plain surface of said spinmy name and affixed my seal, in the presence die, substantially as shown and described. of two attesting witnesses, at; Syracuse, in the 4. The combination of the spindle c, having countyof Onondaga, in the State ot'NewYork, 15 5 the main depression r and the auxiliary dethis 24th day of August, 1882.

pression n, and the collar C and. bolts b, sub- ,l stantially as shown and described. ALVAH SWEETLAND. [L s] 5. The combination otl the roll R, spring S spindle c,havin g depressions 1^ n, colla-r C, bolts Witnesses: 'lo b, and ferrule fv, substantially as shown and de- F. H. GIBBS,

scribed. WM. C. RAYMOND.- 

